NGWS SDK Documentation  

This is preliminary documentation and subject to change.
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Compiler Warning (level 1) C4552

operator’ : operator has no effect; did you forget something?

If an expression statement has an operator with no side effect as the top of the expression, it's probably a mistake.

Example

int i, j;
   i + j;

You can suppress this warning by placing parentheses around the i + j:

(i + j)